Evidence suggests spotted jellies can thrive in Gulf waters

Here's another ecological invasion story... Australian spotted jellyfish invaded the Gulf of Mexico in 2000; it's possible they'll show up again. They could screw up the ecosystem by hunting young fish and eating eggs. At least they don't sting.

Interestingly, this is not our fault. Apparently they just hitched a ride on an unusual current. What that suggests to me is that they won't take up permanent residence, because if it happened in 2000 it's probably happened before, and they didn't stick then.